PS pump replacement
due to bearing
Join Date: Apr 2010
Location: I would rather not say
i was thinking about this, is it ideal not to change this plastic screw for a metal one? i was just thinking if the pressure in coolant built up for some reason then i would assume the 1st thing that would go for the safety of the engine would be this plastic screw? if you fit a metal one then chances are that something else may give way and could cost a lot. my dad's fiesta which i believe has a Mazada 1.2 unit has this pop valve in the cylinder head. the pressure built up for some reason and this pop valve started leaking steam and drops of hot coolant. by the time we turned back and parked on the driveway it popped and steam and a nice steady leak of coolant followed. the diagnoses was the water pump seals were gone and was leaking and letting air in.
maybe its a precautionary measure. open to other thoughts please if anyone think otherwise?